Telephone system.



PATENTED MAR; 5, 1907.

I. KITSEE. TELEPHONE SYSTEM.

APPLICATION FILED APR.8,1904.

2 SHEETS-SHBBT 1.

THE NORRIS PETERS c0, \vasnnvnwrv, n. c.

PATENTED MAR. 5, 1907.

- I. KITSEE. TELEPHONE SYSTEM. APPLICATION FILED APR.8,1904.

z sums-SHEET 2.

JZVVENTOR.

WITNESSES: Q aLQ% Q THE NORR.'S PETER; C0,, \VASHINGTDN, 1:, c4

UNITED STATES @FFTGE.

TELEPHQNE Specification of Letters Patent.

$YST

Patented March 5, 1907.

Application filed April 8, 1904- Serial No. 202,209.

such exchanges is accomplished with the aid of plugs inserted in jacks placed in apertures of switchboards, and it is well understood that, the size of each switchboardbeing limited, only a limited number of subscribers can be accommodated therein, ilve to six thousand being the usual limit, and that partially on account of the greater number of subscribers secondary exchanges have to be employed.

it is one of the aims of my invention to so arrange the terminals of the incoming sub- 5 scriber-circuits that a greater number of such circuits can be accommodated on a board of the size as now employed; and it is also one of the objects of my invention to simplify the construction of the board as well as plug and jack and. also the operations necessary for tirG connecting of two subscribers.

To this end my invention consists of the devices and arrangements, as will hereinafter be described, illustrated in the drawing, and more clearly pointed out in the claims following this specification.

Referring to the drawing, Figure 1 is a diagrammatic view illustrating two oiitl'y n; stations and their normal connections at the exchange. Fig. 2 is a perspective view of a switch as used in the exchange for the cutting in or out of the operators telepl'ione. F 3 is a perspective view of one of the plugs used with my invention. Fig. 4 is a sectional view of a switchboard, showing one of the Fig. 5 1s a corner portion plugs in position.

01 same in plan. Fig. 6 is a bell used at the outlying station, partially in elevation and partially in diagram, showing the connection of the circuits thereto. i

Similar numerals indicate similar parts,

with the exception that in Fig. 1 the numerals designating partsof one circuit are l l l l i 1 also provided with the letter a, so as to clearly d e'line the two circuits which are illustrated in this iigure.

In the Fig. 1, 1 and 2 are the line-wires connec". g the outlying stations to the ex change. In this outl'ing station I have omitted all details of the apparatus, as the same do n t form 3; art ol. my invention, and 1 have only shown tne lever 3 resting on one terminal of th bell 5, the other terminal of which is grounded at 6. I have also shown in conventional sign the transmitting device, (designated by 4..) Te receiver is placed on the hook but not connected, as the connection of as receiver can be made in any of the approved manners o'l co-day without interfering with my invention. The line 1 is comics 1 in the exchange to the positive pole of" the common bat ery 9, and the line 2 is connected in the ex ange, first, to the coil 7 of a repeater, thence to wire 8 and the negative pole of the battery 9. This repeater is provided win the second coil 10, the soft iron core 1.1, and the two armatures 12 and 13. The armature 12 rests normallythat is, when He circuit is not in useagainst a branch ol' thereby making electrical said wire. The armature 12 co nects elecorioallywitri one terminal of the coil 10, the other terminal of which is con; ted through wire 2-1 with the coil of the electromagnet 25, and the other terminal of this coil is c n neetd to wire 26, carried along the s *itchboard, and is provided with the branch 27, terminating each in one of the jacks at one of the switchboards. These l o con ist simply of the tubular conduc- 18. (illustratedn ore fully in Fig.4.) At this junction oi" the termiral of the coil where same connects with wire 2-): there is also co ected elect? 'cally thereto the wire 15. To this wire is electrically connected the lam; 16, connected with its other terminal to wire 14-, having inserted in its circuit the el tromagnet 17. The wire 14 terminates with the armature 135. Between the wire 15 and the lan o 16 are the contacts 44 and 45 of the swivel 37, as illustrated in detail in Fig. 2, the contact est in electrical connection with wire 15 and. the contact 45 in electrical connection with wire 38 and t rough same with the lamp 16. In Fig. 2 tnis switch is illustrated as to consist of the pivoted lever L1, provided with the conductingeplates 4-2 and 13. These conductingplates are in electrical contact with. wires 35 and 36, designed to be the terminals of the operators telephone.

Normally-that is, when the operators telephone should not be inserted in the circuit-the switch is in a position as illustrated in Fig. 2 and the two contacts 44 and 45 are in electrical connection with each other; but when the operators telephone should be inserted in the circuit the switchhandle is moved between the two contacts, thereby separating the same and inserting between them the conducting-plates 42 and 43, and as the same are connected to the terminals of the operators telephone is evident that the same is new inserted in series with the line, allowing the operator to communicate with the subscriber connected to this circuit. The core 11 of the repeater is provided on each side with one contact-point, the contact-point in p oximity to armature 12 being connected through wire 23 to the negative pole of the battery 22, and the contact-point in proximity to armature 13 is connected through wire 21 to the positive pole of said battery 22. On the desk .0, at which the lamp 16 is placed, is also placed for each of the circuits in charge of the operator a lamp (designated at 29) connected with one terminal to one pole of the battery 3]., the other pole of which is connected. to wire 32, terminating at the point s cured to the electromagnet 1.7. The armature 18 of this electremagnet is grounded at 19. The second terminal of the lamp 29 is connected to the cord 33 of the plug 34. This plug consists simply of a round conductor divided at the part designed to come in contact with the conducting-tube 48 into two parts, (designated as 46 and 47,) this for the purpose of securi: g the plug firmly in said. tube. The wire 32 is, through wire 28, in. electrical contact wi h wire 26. For better identification I call one of the subscribers circuits as an entirety circuit A and the second of the subscribers circuits circuit B.

Normally that is, when none of the circuits are in use-the devices are in a position as illustrated in the drawing. Should now subscriber B call up the exchange by removing the receiver from the hook 3 the eurrentfrom the battery 9 will, as usual, flow through lines 1. and 2; but it will at the same time flow through coil 7, hereby energizing the core 1 1 and drawing both armatures 12 and 13 toward it and in contact with wires 23 and 21. Through this manipulation the circuit of the battery which embraces the annunciatinglamp 16, will be closed, and through the.

lighting of this lamp the operator will be notified that this circuit is calling. She will then close switch 37, thereby inserting her telephone in the circuit calling and conversing With the subscriber pertaining thereto. It is supposed that this sub criber wishes to communicate with sul .criber A. The operator simply places the plug 34 into the jack 43 of her own switchboard. This Operation will have the following results:

First. As the eleetron'iagnet 17 becomes energizedthrough the closing of the circuit of the lamp 16 the armature 13 will be drawn in contact with wire 32, and as now the battery 31, including in its ci cuit the lamp 29, connected through plug 34, tube 48 to branch wire 27 ol. the wire 26, and as this wire is, with the lDtQl'POSliliOD 01" clectromagnet 25, coil 10, armature 12, wire 29, coil 7", line 2, lever 3, hell 5, connected to the ground at the subscriber station A, it is olrvious that the circuit of the battery 31 is established through the grounds 19 and 6" and that therefore the bell 5 will ring, notilyingthe subscriber that his circuit is called. 1 will say in passing that 1 do not make use oi the bell as usually employed, answering only to high-tension alternath'ig current as generated by magnetos, but I make use of a bell and arrangement of sam c well known, answering to a voltaie current andbeingkept in motion by the alternate shunting of its electromagnetan arrangement well understood, and therefore not necessary to be described here in detail. The reason why I discard the bell depending on the high-tension magneto is that, more especially where 1mper-covered wires are employed, this paper is easily pierced by such impulses, thereby becoming del'ectiye, and l. employ the arrangement as illustrated in Fig. 6, wherein the electromagnet is alternately shunted through. the striking ol the clapper on the bell, thereby actuating the same and keeping up the ringing as long as the grounded circuit is int act, lor the reason that the making and breaking of the circuit at the central would involve labor and time.

Second. The flow of the current from bat tery 31 through the electromagnet 2? will exert on the armature 13 an inlluenre strong enough so that the later magnetization ol the core 11 will not be able to pull this armature away from its resting-place, and this tact has to be borne in. mind so as to understand. the later operations. The bell at the station A will ring till the subscriber, through the removing of his receiver, breaks the contact ol' the lever 3 with the ground 6", when the ringing will cease. The closing ol the rircuit of the subscriber Awill result in, 'lirst, the es tablishing of a circuit including the telephonic device 4, line 1, lmttery 9, wire 3. coil 7, line 2 and lever 3; but as, as said above, the arn'iature .13 is tightly held by the energized electromagnet 25 the circuit including the lamp 16" will not be made and that lamp will not glow.

Tlird. Tlte flow of the current of the battery31, interrupted entirely by the grounds, will now be as follows: battery 3], wire 30,

lam 29 111 34 tube 18 branch wire 27 tor has to leave the res )ective 111 in the wire 26 e011 2o coil 10 a'JmatuTce 12* l aoimbut when thislanin 1s extin uished the 2 I: a I 1 F.

which aimature is new drawn toward the ows that the c11'cu1t is now idle core 11 and 1.11 contact with tie w1i 'e 23, i .muld be withdrawn. All the Wire 23, armature 12, coil 10, eleetroinagnel 25, Wi'iO 26, wire 23, back to the negative pole o1 the battery. The situatie as far as the armatures of 13110 coils 10 and 1O is conceined, will tlLQTQ'L OFQ be as fc-fcws: (11" the circuit B the armature 12 will rest agai the end of wire 23 and the armature 13 will have been drawn away from wire 21 and '1 rest in a position Where it does 1 with any of these wires. Of the c:

sition W11 :e no contact is made with. any 411' the \Vi'tGS. The COIIVGZSit'tiOD betwee two subscribers will now be cazaied on tollowii'rg mann The vibrations up at the station B will be repeated from ceil 7 coil 10. From there the iinpuls through armature 12, wire 23, w I mature 12, coil 10 electroniaghet 25, wire 26 branch line 27 tube 48 plug 34-, lamp 29, battery 31, wire 28, wize 26, electromagnet 25, back to its point of sta'iting tnat is, back to coil 10. The speech from subses-iber A will be transmitted as follows: The vibrations set up at 4 will 110w through t e coil 7, repeated in the coil 10*, and will t n 110w through 12 23*, 23, 12, 10, 25, 26, 23, battery 31, lamp 29, cozid 33, plug 3 1-, tube 43", bra-11:11 circuit 27, wile 26 electrrina 25, back to ccil 1.0. When. subscribe talking, the impulses generated at 1118 and flowing through its own coil 10 and t e, through coil 10 c1 subscriber A will be 1epeated in t .e c0117 said subs: iber, and he will therefore be able to listen to same. Tite impulses generated at the station. o1" sul scriber A and flowing thin :11 its own coil 10 and then through ccil 10 '1 SUbSC'i'il'JG'i B will be repeated in coil 7, and the subscriber 1 Will be able to listen to the impulses tr initted from A. During all the time t..e lamp 16 will be extinguished that is, as soon as the communicatie- *1 these yo subscribers commences but the lamp 29 will glow during the Whole time c1 such eoi'zv 11s ation and will be extinguished when subscriber B replaces his receiver, t1; ing the circuit with the common bat 22. Thus it will be seen that with. the aid (71' tiese two lamps 16 and 29 the opei ator will le notified, first, when the subscriber 11 charge is calling, and she will also know at she 1"- as made the connections 1 *hen t munication between the subscriber call.

e coin and the subscriber called has ceased. 1t wi be ntniced by a perusal of this drawing 11 Li supervisory la n1 1') this system is minus the this for the reason that lamp 29 talies e' 1- j e toa't L110 operator has to manipulati her listening-key one s1 ngle conductor into a meand withdrawing said conductor tifieation through her annunciator. iirgs 01" this system are positive and the number of devices are reduced to a 11111 mum as coinpaiced With the number oi devices now 11 use in exchanges, a11d,w11at is more, th e operate? can 11 are lter attention concei a'ted on her "desk, as the devices on her des1 will notify her plainly what to do.

1. will conte now to the construction of the switchboard which is one 01 the individual Features 01 my invention. It is Well known that the jacks and p ugs of to-day consist 01' a rather con ,ated arrangement whereby parts of the circuit have to be broken or whereby parts have to be made, the plug and jacli each consisting of separate contacts and springs. The space such a jack occupies has to me rather a large one, comparatively speaking; but with 1113* iuiiproved ack and phi this seace can be greatly reduced,

and in Fig. 1 the illustration shows a jacl: and plug ot about lull size that 1s, the space oi nearly an inch usually taken up by one ia li o1 toalaf; can be reduced with the aid 01 my invention to a snaee of about threccightl s oi an inch, and a switchboard Which to-day can aceon inodate only live thousand SUlJSO-EllJGIS with 1. arrangement can acconi- Besides, whereas each jack of the switchiaifid as now employed. requiies two incoming and two outgoing wires, with my invenien only one incoming wire is necessary, a

176 1 adily appreciated by persons versed in the art.

.1 have not illustrated the arrangement by which a subscribe? in" one exchange in ay be connected to a subsciiler of a second exchange through one oi the lines connecting bo'h exchanges together. as this will form nait oi. another application. l t suthces to o here that in connecting one 01 the sul i-eiscuits to a tlUDli-(iiOUit I also in ttlU se oi the plug 3 1:, as illustrated, and another conductor, which in l ig. 1 is designated by the i'n nilrer 10, but is. in this liguie, broken oil". not showing the end tern inaht the reason that. the mode of connecting a circuit to a trunk-line, as said above, will form the sub ject of a dii'l'erent application. it is obvious that latter 31 is not sullicient to e'll'ect the armati 12 when the circuit is closed thi'oug'h the winding 10, and this (i'inature is therefore at r st during this operation.

Having now descri ed my invention, what 1 claini as new, and desire to secure by Letters Patent, is-

1. In a telephonic system wherein two or more outlying circuits center in one exchange, a repeater for each of said circuits, 1

one coil thereof connected in said circuit, the second coil thereof connected with a localized circuit, an annunciator in said localized cir cuit, a source of current for said circuit, said circuit normally open but adapted to he closed through the armature of said repeater, a conducting-line connected with one terminal to said second coil and connected with the other terminal in multiple arc to one jack in each of the switchhoards, a second annunciator, a source of current, and connectingplug in electrical contact with said conducting-line.

2. In telephony, the circuits of two or more outlying stations centering in one exchange, each circuit provided with a repeater, one coil of said repeater connected directly to the outlying circuit, the second coil of said repeater adapted to be connected electrically to said outly 7 the arm aturc of said repeater, eachol' said repeaters provided. with means to close a second circuit independent o'l. the cord-circuit, a second circuit, a source of current for said second circuit and an annunciator theretor, each repeater also provided with :neans to connect thereto one jack in each of the switchboards located in said exchange.

3. In a telephonic exchange a series oi repeaters connected each with one coil to an outlying station and connected each with one coil to a series of jacks, each of said jacks located in a separate switchboard, the second of said coils adapted. to be connected to the armature of said repeater of said outlying circuit when not in use and adapted to be connected when in use to a second circuit source of current and an annunciating device for said second circuit.

4. In a telephonic system wherein two or more outlying circuits center in one exch angc, means in said exchange for iach ol? said circuits to repeat the impulses transmitted, means to estaltlish. a ci cuit including the repeating means of two circuits, said means consisting of a single conductor normally connected to one of said circuits a plug connected to one of said circuits, itoth ol said circuits adapted to le connected through the insertion 01 said plug in one ot the (liS pertaining to one ol said circuits.

5. In conriination with a telephonic vircuit centering in an exchange, a source of current included in said ci cuit. an electromagnetic device included in said circuit, said electromagnetic device provided with two armatures, second son cc of current, circuit for said source, and an annunc ator tor said circuit, the terminals of said circuit adapted to re brought in electrical contact through said armatures, one of said armatures normally in contact with one of the ing circuit through lines of said circuit, but adapted to break said contact as soon as said electromagnetic device is energized.

6. In comlination with a telephonic circuit centering in an exchange, a source of current for said circuit, a repeater for said circuit, said repeater provided with two armatures, a second circuit, and a source of current tor said. second circuit, said second circu t normally open but adapted to be closed through the energizing ol the core ol said repeater, an annunciator for said second circuit. adapted to lo made active through the closing ol said circuit.

7. In comtination with. a telephonic circuit centering in an exchange, a repeater for said circuit, one coil of said repeater connested in said circuit, the second coil connected to a l ealized circuit, an amiunciator, a source of current lor said localized circuit, said localized circuit adapted to lie operated through the armature of said repeater, a sec ond annunciating device, a circuit tor said device, source of current tor said circuit. a plug connected to said circuit, said annunriating device adapted to lTO made operative through the insertion ot the plug in a second telei ihonic circuit.

8. In a telephonic system wherein two or more circuits center in one exchange, a repeater for each oi said circuits, an annuneiator means ope 'aiively related to said repeater to make active the annunciator per taining to said circuit, a source of unidirectivc current including a second annuneiator connected normally to one coil of said repeater and provided with means to be connected to a second circuit and. means where by the repeated impulses of one circuit are transmitted. over a circuit including a coil of a repeater pertaining to a second circuit, and where y the second :umuneiator is made ac- "ive as long said repeatingcircuit. is maintained.

9. In combination with a tele 'ihonc system wherein two or more circuits center in one exchange, connecting means and repeatingcoils in said exchange, said connecting means consisting oi a single coiuluctor located in the switchbrnird and normally connected electrically to the repeating-coil ol one circuit, and a second conductor, movable, and adapted to be brought into electrical contact with said 'lirst conductor, said second conductor connected electrically to the repeating-coil of a second circuit.

10. In combination with two telephonic circuit centering in one exchange, each provided 2* ha repeating-coil, connectingmeans to connect said two circuits inductively for the purpose of interconnnui'iication, said connecting means consisting ol a stationary jack located in the switchboard and a movable plug, said stationary jack consisting ol one single conductor connected to a repeat- LII.

ing-coil of one of said circuits, and the plug consisting oi a single conductor normally connected to a repeating-coil of the secend of said circuits designed to be connected to the said first circuit.

11. In combination with two or mere telej phonic circuits centering in one exchange, a repeater 101 each 01' said circuits, annuneiating means in operative relation to the arniature of the repeaters for each of said circuits, a generator oi electricity and an electromagnet for the circuit of said annuiiciating means, and a third circuit including a source of current, said third. circuit on erativcly connected to the grounded armature ol said electroinagnet.

12. In combination with two telephonic circuits centering in one exchange, rereating means for each oi said circuits, a series cl switchbeards in said exchange, each of said switchboards embracing one terminal of the 1 repeating means of each of said circuits,

connecting means for each of said circuits, 1

switchboard-terminalof a second circuit, a repeating-circuit is established including the repeatin means of both circuits.

13. in combination with two telephonic circuits centering in one exchange, means to connect said two circuits inductively for the purpose of communication, said means embracing a repeater for each of said circuits, one coil of each of said repeaters in- 1 eluded in one of said circuits, the second of 1 name, in the presence ol two subscribing witeach of said connecting means normally in electrical connection with the repeating 1 means 01' one oi said circuits, in a manner so that through the electrical connection of the connecting means of one circuit with the nesses, this 5th day of April, A. D. 1904.

ISIDOR KITSEE.

fi itiiessesz Enirii R. STILLEY, H. C. YETTER. 

